(1) as the final stage of the study of last three years, following works were carried out and the report was made.(2) A draft paper titled a dynamic forest register system which was submitted to the Journal of Japanese Forestry Society, and the forest environment maps which were part of the paper were produced. This system was applied at the experiment forest Kusaki of Tokyo University of Agriculture and Technology. Following maps were produced using a geographic information system GIS.Compartment-subcompartment map, Terrain index map, road-distance map, tree spieces map, tree-aged map, forest-type map, stem-volume map, diameter map, harvest priority map, forest function map, elevation map,(3) Transition maps from natural forest to plantation were produced by the GIS.The text field was Kiso national forest in Nagano. In the period of 90 years between 1900 and 1990, natural forests were haruested and then changed to the plantations. these transition maps were produced by the interval of 20 years. The maps of harvested compartment in each ten years were produced(4)The forest environment atlas was compiled using these maps.これらのデータから、1900年から各10年間ごとの伐採ヶ所を示す伐採位置図を作成した。(4)これらの転換図および伐採ヶ所図から、各時代における伐採方法,伐採ヶ所の大きさ,伐採ヶ所の配置の傾向をとりまとめた。その結果、大面積皆伐から小面積皆伐,そして再び大面積皆伐、さらに小面積皆伐へと森林施業の推移を明らかにした。(5)以上の作業により作成した地図を取りまとめ、森林環境地図帳(カラー)として報告書をまとめた。